Mailman 3 March 2015 - Twisted

[Twisted-Python] Buildbot downtime
by Tom Prince March 3, 2022

March 3, 2022

I am plannig to upgrade twisted's buildbot in the near future. In preperation for that, I am going to take down the production buildbot on Tuesday, June 26, around 1600 UTC[1]. During that time, the result of any builds done will be lost. Thus, I'd ask that people avoid committing to trunk during that time. I will send a reminder before I take down the buildbot both here, and on #twisted and #twisted-dev. Tom [1] http://timeanddate.com/worldclock/meetingtime.html?iso=20120626&p1=80&p2=22…

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[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

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May 1, 2019

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[Twisted-Python] revisiting onboarding
by Glyph Lefkowitz Oct. 26, 2015

Oct. 26, 2015

A few months ago, the question of an official process for obtaining commit access was raised. The discussion lead to this proposal - https://twistedmatrix.com/trac/wiki/Proposal/ContributorAdvancementPath <https://twistedmatrix.com/trac/wiki/Proposal/ContributorAdvancementPath>. I like that proposal, but it is still incomplete: to wit, it defines a template for how roles might be defined but does not actually define any roles. It also seems to be a bit overly ambitious, just from the … [View More]

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[Twisted-Python] txmongo vs. pymongo + callInThread
by Clayton Daley Oct. 12, 2015

Oct. 12, 2015

Are there any major disadvantages of using pymongo with callInThread instead of txmongo? I'd like to take advantage of some newer features in pymongo (unfortunately not available in txmongo) and it's certainly easier to maintain feature parity using callInThread. Clayton Daley

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[Twisted-Python] Silverberg CQL Driver
by Jason J. W. Williams July 2, 2015

July 2, 2015

Is anyone using the silverberg CQL (Cassandra) library for Twisted in production? Just curious what people's experience with it is, since it appears to be the most recently updated Twisted/CQL project. -J

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[Twisted-Python] LoopingCall.withCount countCallable called with 0
by Dario Vinella May 10, 2015

May 10, 2015

Hi all, I found an odd behavior using a LoopingCall.withCount with a very small interval (0.02 sec): sometimes the countCallable is called with 0 as argument and it looks like the now - _realLastTime is smaller than the looping interval. Here you can find the very simple code I use to reproduce the "anomaly", with a main loopingCall and another one that prints its internals https://gist.github.com/dvinella/31d94f9dd0e47586658d and here an extract of the logs it produces https://gist.… [View More]

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[Twisted-Python] IRCClient (ircLogBot.py) send a message every 5 minutes
by Laurens Vets April 7, 2015

April 7, 2015

Hello, I'm trying to get to know the Twisted framework by extending the ircLogBot.py example. I want to be able to get a list of all names in a channel (by sending NAMES) and I want to rerun this every 5 minutes. I've been able to get the NAMES on a channel join by doing this in LogBot: def joined(self, channel): self.names(channel) def names(self, channel): self.sendLine("NAMES %s" % channel) def irc_unknown(self, prefix, command, params): if command == 'RPL_NAMREPLY': … [View More]

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[Twisted-Python] Twisted Project Job Posting
by exarkun＠twistedmatrix.com April 5, 2015

April 5, 2015

Hello all, The Twisted issue tracker needs someone to pay attention to it for spam content and clean up that content. I've been taking care of this for a while now but I'm going to step back from this position soon. These days spam is primarily submitted as new tickets. When a spam ticket is filed, it needs to be deleted. There's a form in the trac web interface for deleting tickets. Access needs to be specially granted, so you need a trac account to volunteer for this role. Trac is … [View More]

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[Twisted-Python] Twisted CoAP implementation
by Giacomo Tanganelli April 2, 2015

April 2, 2015

Hi, I have recently implemented a CoAP open source library based on Twisted. I noticed that in the web site there is a page regarding Twisted sub-projects. I'm wondering if I can add my project to such list, I think it could help someone. Does anyone know ho to achieve this? In any case the code is freely available at https://github.com/Tanganelli/CoAPthon Bests Giacomo -- Giacomo Tanganelli PhD Student Dept. Information Engineering Via Diotisalvi 2, I-56122 Pisa, ITALY Phone (direct/… [View More]

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[Twisted-Python] Unhandled Error in python 3 test suite
by Adi Roiban March 30, 2015

March 30, 2015

When running the pyhon3 tests I see many Unhandled Error ex: https://buildbot.twistedmatrix.com/builders/python-3.3-tests/builds/2736/st… This looks bad. Is this a bug in the test runner or a bug in the code? Thanks! -- Adi Roiban

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com March 29, 2015

March 29, 2015

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[Twisted-Python] Twisted on Windows, 2015 edition
by Christian Long March 26, 2015

March 26, 2015

I'm writing up my experiences porting a Twisted application from Linux to Windows. Part 1 is up, covering how to install the requirements. http://www.christianlong.com/blog/twisted-on-windows-2015-edition.html Part 2 will cover running Twisted as a Windows service. Part 3 will cover making your own binary distributions using wheel. Python packaging has improved a lot in recent years, especially on Windows. Glyph, thank you for pypiwin32. I'm trying to make these instructions as up-to-date … [View More]

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[Twisted-Python] Reporting total traffic that goes through an SSL socket
by Burak Arslan March 26, 2015

March 26, 2015

Hello All, I'm using twisted for implementing a custom protocol via SSL. I've been wondering though, is there an easy way of counting the number of bytes that go in and out of the socket, including SSL overhead? I can easily count what I'm reading and I'm writing, but not what actually goes through the pipe. I do realize that I won't be counting packet replays and such, that's fine for the time being. Best regards, Burak

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[Twisted-Python] Removing Python 2.6 Support after Twisted 15.1
by HawkOwl March 24, 2015

March 24, 2015

Hi, As Python 2.6 has been officially abandoned for a year+ (and will receive no further official security updates) and Python 2.7 has been available for almost five years, it might be time to put Python 2.6 support to bed. The only currently supported distro that has Python 2.6 is RHEL6, and RHEL7 with Python 2.7 has now been out for a year. This would be in line with other major projects (eg. Django, Plone) and Python's porting guide (https://docs.python.org/3/howto/pyporting.html#drop-… [View More]

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[Twisted-Python] JOB: Senior and Lead Engineers | ClusterHQ | Bristol, UK | relocation offered
by hello from techfolk March 24, 2015

March 24, 2015

Dear Twisted Matrix community, We hope that is ok to share jobs in this manner as we urgently need your skills in event-driven asynchronous systems programming. In particular, we need you to help solve the kinds of containerisation and data management problems that arise from deploying modern applications in a micro-service environment, integrating with Docker, Mesos, CoreOS etc. ClusterHQ is a recently funded open source provider preparing for the first major release of the Flocker … [View More]

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[Twisted-Python] Branch name convention
by Adi Roiban March 22, 2015

March 22, 2015

Hi, I would like to ask why the twisted branch name convention ask for trailing ticket ID. Why not leading ID? some-text-1234 vs 1234-some-text ----- The default git auto completion script only does search at the start of the string. When I work on a ticket I know the ticket number but I always forget the name of the branch... so I have to search it inside the Trac ticket. It is not a big deal and I know that there are greater annoyances in Twisted dev process but I am curios if there … [View More]

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[Twisted-Python] Weekly Bug Summary
by trac＠twistedmatrix.com March 22, 2015

March 22, 2015

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[Twisted-Python] Twisted 15.1 feedback
by HawkOwl March 21, 2015

March 21, 2015

Hi everyone, It's been about two weeks now -- does anyone have any feedback on whether 15.1 worked/didn't work/caused a resonance cascade? If you missed the announcement, tarballs can be found at http://twistedmatrix.com/Releases/pre/15.1.0pre1/ , and the full NEWS file can be found at http://twistedmatrix.com/Releases/pre/15.1.0pre1/NEWS.txt . Once I'm happy that it's not completely broken, I'll push 15.1 out the door proper, and get 15.2 on the way... :) - Hawkie

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[Twisted-Python] __nonzero__ for Deferred
by Glyph Lefkowitz March 20, 2015

March 20, 2015

I'd like to deprecate and remove __nonzero__ on Deferreds. Occasionally I see code where someone (maybe even me) does "if d:" where they should have been doing "@d.addCallback def cb(result): if result: ...". Anybody else have this issue? Objections? -glyph

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[Twisted-Python] custom FTP server is blocking
by Paul Wiseman March 20, 2015

March 20, 2015

I have some blocking going on in a custom twisted ftp server and I'm trying to pin point what exactly is doing it. I think this line in openForReading on my FTPShell object could be the culprit: _FileReader(urllib2.urlopen(result.link,timeout=settings.GLOBAL_TIMEOUT)) (_FileReader is twisted.protocols.ftp._FileReader and result.link a url string) I'm guessing urllib2.urlopen blocks resolving the domain and connecting? What would be the twisted equivalent way of providing a file like object … [View More]

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[Twisted-Python] twisted echo ssl client with .p12
by Timothy Gallagher March 20, 2015

March 20, 2015

Hello all, I have a project that requires client server with ssl/tls including client certificate authentication. Also the a requirement is that the client needs to use a .p12 file to house its keys. I have the server part and client part down except I cannot find any code examples using a .p12 file to get the certificates. Can this be done without having to hack into the ssl.ClientConextFactory? ctx = ssl.ClientContextFactory.getContext(self) ctx.use_certificate_file('keys/client.crt') ctx.… [View More]

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[Twisted-Python] twistechecker and twisted-dev-tools as part of twisted main repo
by Adi Roiban March 20, 2015

March 20, 2015

Hi I know that twisted main repo contains a lot of code but I would like to discuss the option of merging twisted-dev-tools and twistedchecker into twisted main repo. The main reason why I want this is to make reviews for these repos more visible to twisted developers. I don't think that we would have a different team of developers working on twisted and another one on twisted tools and twistedchecker I understand that twistedchecker was started as a SOC project and I agree that is much … [View More]

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[Twisted-Python] 100-continue and rejecting connection after headers are received
by Adi Roiban March 19, 2015

March 19, 2015

I am moving this to a dedicated ticket I start working on 100-Continue here https://twistedmatrix.com/trac/ticket/6928 and was asked to follow up on the mailinglist ... which due to slow review progress I gave up.. so I am doing it now. On 19 March 2015 at 15:53, HawkOwl <hawkowl(a)atleastfornow.net> wrote: > >> On 19 Mar 2015, at 23:26, Adi Roiban <adi(a)roiban.ro> wrote: >> >> Hi, >> >> My usecase is this: >> >> When all headers of … [View More]an HTTP request are received I want to ask a >> remote service if the >> request should be accepted and what to do with it. >> >> Before I got the response for the remote service, I don't want to >> receive/read HTTP data. >> The response is returned via an deferred. >> >> The HTTP data might be a 10G file which might be rejected.. for >> example due to quota limits. >> >> Here is a gist with a short example and my quick and dirty fix: >> https://gist.github.com/adiroiban/621efeab47662a04cb20 >> >> ------ >> >> Do you think this is a valid use case and that someone would be >> willing to review a patch to add such a feature? > > Ah yes, the 100-Continue stuff! I mentioned it briefly in my talk at PyCon AU. > > It would be a useful feature, and I looked into it a little bit, but I'm not entirely sure how it would be accessible to user code. Most web server frameworks (Django, Klein, Flask, et al) work on a "here's a full request, send a full response" (only Twisted/Klein can do more than send a whole response without hacks :) ) and fitting it into that sort of framework would be a bit confusing. > > So, my question is, because this functionality is desirable, how would it be exposed to the user? Maybe if it did traversal prior to the whole request being completed, and called something like headers_POST() or headers_GET() similar to render_GET/POST/etc, which would give the user access to these headers. A Deferred firing with True unblocks the producer, a Deferred firing with False kills off the request. I already have 100-continue in production ... and I also have a code which rejects a request after headers were received even if 100-continue was not used. When all headers are received I am traversing the url and inform the resource about the headers... before content is received. I have a special resource which has a new headersReceived method. This method should return http._CONTINUE as otherwise the request is rejected. This only work for resource traversals which don't depend on the request body. Exarkun made an excellent comment here https://twistedmatrix.com/trac/ticket/6928#comment:5 The new resource interface is simple. Here is a dump from my current code https://gist.github.com/adiroiban/1a515a9354a8168a0275 Here is a diff on Twisted https://github.com/twisted/twisted/compare/trunk...chevah:6928-http-100-acc… Please review the interface and let me know if it make sense to you. I am happy to continue working on this as long as others are interested in reviewing the patch. Thanks! -- Adi Roiban [View Less]

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[Twisted-Python] Pausing the transport in http.HTTPChannel.lineReceived after all headers are received
by Adi Roiban March 19, 2015

March 19, 2015

Hi, My usecase is this: When all headers of an HTTP request are received I want to ask a remote service if the request should be accepted and what to do with it. Before I got the response for the remote service, I don't want to receive/read HTTP data. The response is returned via an deferred. The HTTP data might be a 10G file which might be rejected.. for example due to quota limits. Here is a gist with a short example and my quick and dirty fix: https://gist.github.com/adiroiban/… [View More]

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